<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8"/>
    <title>Error</title>
</head>
<body >
<div style="width: 100%;height: 100%;align-content: center;">
    <h1>404</h1>
    <h2>您访问的页面不存在！</h2>
</div>

</body>
</html>